Elp2 mutations perturb the epitranscriptome and lead to a complex neurodevelopmental phenotype.
Animals
Autism Spectrum Disorder
/ genetics
Disease Models, Animal
Epigenesis, Genetic
Grooming
/ physiology
Humans
Intellectual Disability
/ genetics
Intracellular Signaling Peptides and Proteins
/ genetics
Mice, Inbred C57BL
Mice, Inbred DBA
Mice, Knockout
Mutation
Neurodevelopmental Disorders
/ genetics
Phenotype
Sf9 Cells
Spodoptera
Transcriptome
/ genetics
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
11 05 2021
11 05 2021
Historique:
received:
31
05
2020
accepted:
24
03
2021
entrez:
12
5
2021
pubmed:
13
5
2021
medline:
2
6
2021
Statut:
epublish
Résumé
Intellectual disability (ID) and autism spectrum disorder (ASD) are the most common neurodevelopmental disorders and are characterized by substantial impairment in intellectual and adaptive functioning, with their genetic and molecular basis remaining largely unknown. Here, we identify biallelic variants in the gene encoding one of the Elongator complex subunits, ELP2, in patients with ID and ASD. Modelling the variants in mice recapitulates the patient features, with brain imaging and tractography analysis revealing microcephaly, loss of white matter tract integrity and an aberrant functional connectome. We show that the Elp2 mutations negatively impact the activity of the complex and its function in translation via tRNA modification. Further, we elucidate that the mutations perturb protein homeostasis leading to impaired neurogenesis, myelin loss and neurodegeneration. Collectively, our data demonstrate an unexpected role for tRNA modification in the pathogenesis of monogenic ID and ASD and define Elp2 as a key regulator of brain development.
Identifiants
pubmed: 33976153
doi: 10.1038/s41467-021-22888-5
pii: 10.1038/s41467-021-22888-5
pmc: PMC8113450
doi:
Substances chimiques
ELP2 protein, human
0
Intracellular Signaling Peptides and Proteins
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2678Références
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